Formation and Processing of Organic Aerosols Measured by a Time of Flight Aerosol Mass Spectrometer during TexAQS/GoMACCS 2006

HR: 1340h
AN: A33D-1567 [Abstracts]
TI: Formation and Processing of Organic Aerosols Measured by a Time of Flight Aerosol Mass Spectrometer during TexAQS/GoMACCS 2006
AU: * Bahreini, R
EM: Roya.Bahreini@noaa,.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: * Bahreini, R
EM: Roya.Bahreini@noaa,.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Middlebrook, A M
EM: ann.m.middlebrook@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Decarlo, P F
EM: Peter.Decarlo@colorado.edu
AF: Departments of Chemistry and Biochemistry, University of Colorado, 215 UCB, Boulder, CO 80309, United States
AU: Denlea, E
EM: edward.dunlea@colorado.edu
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Jimenez, J L
EM: jimenez@colorado.edu
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Jimenez, J L
EM: jimenez@colorado.edu
AF: Departments of Chemistry and Biochemistry, University of Colorado, 215 UCB, Boulder, CO 80309, United States
AU: Brock, C A
EM: Charles.A.Brock@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: deGouw, J A
EM: Joost.deGouw@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: deGouw, J A
EM: Joost.deGouw@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Flocke, F
EM: ffl@ucar.edu
AF: National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, United States
AU: Gallar, C
EM: carlos.gallar@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Gallar, C
EM: carlos.gallar@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Holloway, J S
EM: John.S.Holloway@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Holloway, J S
EM: John.S.Holloway@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Neuman, J A
EM: Andy.Neuman@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Neuman, J A
EM: Andy.Neuman@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Ryerson, T B
EM: Thomas.B.Ryerson@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Schwarz, J P
EM: Joshua.P.Schwarz@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Schwarz, J P
EM: Joshua.P.Schwarz@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Spackman, J R
EM: Ryan.Spackman@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Spackman, J R
EM: Ryan.Spackman@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Trainer, M K
EM: Michael.K.Trainer@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: warneke, C
EM: Carsten.Warneke@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: warneke, C
EM: Carsten.Warneke@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Wollny, A G
EM: Adam.Wollny@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Wollny, A G
EM: Adam.Wollny@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AU: Zhang, W
EM: wengang@ucar.edu
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Zhang, W
EM: wengang@ucar.edu
AF: National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, United States
AU: Fehsenfeld, F C
EM: Fred.C.Fehsenfeld@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, 216 UCB, Boulder, CO 80309, United States
AU: Fehsenfeld, F C
EM: Fred.C.Fehsenfeld@noaa.gov
AF: National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, 325 Broadway, Boulder, CO 80305, United States
AB: Formation of particulate matter is common in areas with high emissions of volatile organic compounds (VOCs), NOx, and SO2. These particles have lifetimes of days to weeks, and thus can have both local and regional effects on visibility, air quality, and human health as well as direct and indirect effects on climate. During TexAQS 2006, mass concentrations of non-refractory inorganic species (sulfate, ammonium, and nitrate) and total organics in submicron aerosols were measured by a Compact Time of Flight Aerosol Mass Spectrometer (C-ToF-AMS) onboard the NOAA WP-3D aircraft. In this presentation, we analyze composition changes of organic aerosols in different air masses. We examine organic mass spectra along with simultaneous measurements of VOCs and their oxidation products in order to determine the contribution of anthropogenic and biogenic sources to the aerosol organic mass. These measurements were performed in plumes intercepted during the daytime north of Houston where large isoprene emissions were observed. Furthermore, the fresh hydrocarbon-like (HOA) and processed oxygenated-like organics (OOA) fractions of the total organic aerosol mass in several plumes transected during daytime and nighttime are presented and compared. We will also discuss differences in correlations between organic aerosol composition markers and primary or secondary gas-phase species in different plumes.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting